Grinding and polishing machine



June 4, 1935. c. B. GARWQOD 2,003,504

GRINDING AND POLISHING MACHINE Filed June 25,. 1932 2 Sheets-Sheet l m AQ N 1 q I a: LhafllesHGaPu/ood 3 H a:

June 4, 1935- B, GARWOOD 2,003,504

GRINDING AND POLISHING MACHINE Filed June 25 1952 2 Sheets-Sheet 2 sq NPatented June 4, 1935 PATENT OFFICE GRINDING AND POLISHING MACHINECharles B. Garwood, Linthicum Heights, Md., as-

1siigilnor to Carr-Lowrey Glass 00., Baltimore,

Application June 25, 1932, Serial No. 619,325

4 Claims.

This invention relates to a machine designed primarily for use ingrinding and polishing articles such as glass bottle stoppers and thelike.

It is an object of the present invention to provide a holder forsupporting articles of any size desired and for maintaining them incontact with the grinding or polishing element, the holder beingprovided with a means for simultaneously rotating and reciprocating thearticles being treated, thereby to dress the articles uniformly andavoid undesirable channeling or-scarring of the grinding element.

A further object is to permit quick changing of the articles beingtreated and to provide a means whereby the holders for said articles canbe shifted readily and held in retracted position, if desired. V

A still further object is to provide simple and efficient mechanism forrotating and reciprocating the holders.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes may be made inthe precise embodiment of the invention herein disclosed within thescope of what is claimed without departing from the spirit of theinvention.

In the accompanying drawings the preferred form of the invention hasbeen shown.

In said drawings:

Figure 1 is a rear elevation of the apparatus, the position of thegrinding and polishing elements relative to the articles being treatedbeing indicated by broken lines.

Figure 2 is an end elevation of the apparatus viewed from the right inFigure 1.

Figure 3 is a section on line 3-3, Figure 1, one of the positions of theholder being indicated by broken lines.

Figure 4 is an enlarged section through one of the holders, a portion ofits supporting spindle being shown adjusted thereto.

Figure 5 is a section showing a portion of the speed reducing gear.

Referring to the figures by characters of reference, I designates a baseon which is mounted a motor 2 the shaft 3 of which has a small gear 4adapted to drive a large gear 5. This latter gear has a tubular shaft 6mounted for rotation in a bearing 1 and said shaft is slottedlongitudinally, as shown at 8.

Suitably disposed bearings 9 are provided for a shaft I mounted to slideand rotate therein and one end of this shaft, which can be enlarged asshown at I I, is slidable in tubular shaft 6 and has a pin I2 or thelike'slidable in the slot 8. Thus the two shafts 6 and IE) rotatetogether, the shaft I0 however, being slidable relative to shaft 6.

A collar I3 is secured to the shaft I0 and receives thrust froma springI4. A lever I5, which is fulcrumed at I 6, is operatively connected tocollar l3 in any preferred manner, as indicated for example at IT, andthe free end of this lever can 10 be provided with a roller I8 forengagement with the periphery of a cam I9.

Secured to the shaft I0 so as to slide therewith is a series of housings20 each of which has an upwardly extending spindle 2 I journaled therein. A gear 22 is secured to the spindle within housing and meshes with aworm 23 in said housing secured to shaft I0.

Each housing has an upwardly extending finger 24 and a depending flatblade 25. Each blade is 20 connected byan adjustable spring 26 to aplate 21 upstanding from base I and slidably in this plate are rods 28one of which is provided for each blade 25. Each rod is guided inanangular strip 29 on the base I so as to be held against displacement anda stop pin 30 is carried by each rod for preventing Withdrawal of therod fro the guide plate 21. y f

The upper end of each spindle 2| is adapted to be detachably engaged bya holder 3| having a 3 socket 32 in its upper end for the reception of aglass stopper S or the like to be treated The holder can be detachablyjoined to the spindle in any manner desired. For example, the spindlecan be provided with a tapered end 33 which can 35 be of any desiredcontour and the holder can be formed with a socket 32 for receiving saidend. It is essential that the holder move with the spindle and at thesame time be readily removable therefrom.

Shaft II! is slidable within but rotates with a sleeve 34 provided witha gear 35. This gear, which is held against sliding movement by anysuitable means, constantly meshes with a gear 36 secured to shaft 31which is journaled in a housing 38. This housing contains worm reductiongearing, indicated generally at 39, for transmitting motion to a shaft40. Said shaft, in turn, through worm gearing 4| drives a shaft 42 atreduced speed, this shaft constituting the support for the cam IS.

The springs 26 arelight ones and are merely of sufficient strength tohold the supported stoppers or the like against the peripheries of thegrinding or polishing wheels which have been indicated generally at W.

In practice the spindles 2! can be pulled away from the wheels W bymeans of the finger pieces 24 at which time the blades 25 will move awayfrom the rods 28. As soon as the finger pieces are released the stemswill move back toward the wheels under the action of springs 26.

While the stems are withdrawn from the wheels the stoppers or otherarticles to be ground or polished are inserted into the sockets 32, theholders being so proportioned that the edges of the stoppers or the likewhich are to be dressed or polished will project therebeyond. After thestoppers have been placed in the holders and the stems released to bringthe held articles in contact with the wheels, a rapid and effectivegrinding or polishing operation will be set up due to the fact-thatthree motions are utilized. Not only are the wheels W rotating at thedesired speed but all of the spindles 2| are being simultaneouslyrotated about their longitudinal axes by shaft in and the gearing inhousing 2t. Furthermore, shaft i is being reciprocated during thisoperation by the action of cam IS on lever l5. This reciprocating motionwill be such as to move the held articles back and forth along theperipheries of the contacting wheels. As a stopper becomes properlyfinished the spindle 2| supporting it can be swung outwardly, thestopper removed, and another inserted whereupon the operation can becontinued. The speed of rotation and reciprocation of the stoppers isquite slow due to the speed reducing gearing employed and as the heldarticles are constantly in movement against the faces of the wheels W,said wheels will be free from grooves or channels which might otherwisebe produced therein.

It will be noted that the axis of rotation of each supported stopper Sor the like is extended across the path along which the stopper isreciprocated. In other words the plane of rotation of the stoppercoincideswith its plane of reciprocation. As the stopper advances ineither direction during its rotation the grinding or polishingactionwill be in the direction of the circumference of the stopper andnot along lines extending transversely of the periphery. Consequentlythere would be no advancing stopper edges to be chipped off throughfrictional engagement with the polishing or grinding wheel and thedragging action of the stopper or the like upon the wheel.

Should it be desired to maintain one of the stems 2| in retractedposition against the action of its spring 26 it would merely benecessary to thrust through rod 28 against the blade 25 associated withthat particular spindle. The rod has a notch 43 which can drop intoengagement with guide plate 21 and thus hold the rod against slidingmovement.

Blades 25 are of suflicient width to prevent them from becomingdisengaged from their rods 28 during the reciprocation of shaft whileone or more of the stems 2| are contacted.

While this'apparatus is especially designed for grinding or polishingthe edges of glass stoppers or the like it is to be understood that itwill be found useful in similarly treating other kinds of articles.

What is claimed is:

1. A machine of the class described including a shaft, means forrotating the shaft, means operated by the rotation of the shaft forreciprocating it, a housing supported by and adapted to reciprocate withthe shaft, a spindle extending from the housing, means for transmittingrotary motion from the shaft to the spindle, means on the spindle forholding an article to be treated, yielding means for holding the spindlenormally in one extreme position, and means connected to the housing forshifting the spindle away from said position, said means including apush rod and means movable with the housing for slidably engaging theend of the rod during the reciprocation of the shaft and housing.

2. A machine of the class described including a shaft, means forrotating the shaft, means operated by the rotation of the shaft forreciprocating it, a housing supported by and adapted to reciprocate withthe shaft, a spindle extending from the housing, means for transmittingrotary motion from the shaft to the spindle, means on the spindle forholding an article to be treated, yielding means for holding the spindlenormally in one extreme position, means connected to the housing forshifting the spindle away from said position, said means including apush rod and means movable with the housing for slidably engaging theend of the rod during the reciprocation of the shaft and housing, andmeans cooperating with the rod for holding it against movement whenshifted from normal position, thereby to hold the spindle in theposition to which it had been shifted 3. A machine of the classdescribed including a shaft, means for simultaneously rotating andreciprocating the shaft, gear housings mounted to swing upon the shaftand to reciprocate therewith, spindles extending from the housings anddriven by the shaft, article holding means on the spindles, fingersextending from the housings for swinging the spindles in one direction,yielding means for resisting said swinging movement, and means forholding the spindles against swinging back to their normal positions,said means including slidable rods, guiding means therefor, means on therespective housings for sliding engagement with the ends of therespective rods, and cooperating means on the rods and means for holdingthe rods against movement.

4. In a machine of the class described a rotatable wheel, means forsupporting an article for rotation in a plane extending substantiallyradially of the wheel and about an axis in the plane of rotation of thewheel, means for moving said

